week 2 Flashcards
Engine Components
CLASSIFIED INTO FOUR (4) GROUPS:
power chain
stationary parts
valve system
auxiliary parts and Accessories
– to receive, exert, and
transmit the motive forces
power chain
– to constrain and support
moving parts
Stationary Parts
– time the operating
sequence
Valve System
– receives and transmits the pressure
forces in the combustion chamber to the
rotating crankshaft
piston
– retain compression; reduce
cylinder wall contact thereby reducing
friction losses and wear
piston rings
serves to fasten the piston to the
upper end of the connecting rod; wrist pin
Piston pin
– transmits the power of
combustion from the piston to the
crankshaft
Connecting rod
- bearing where
connecting rod fastens to crankshaft
Connecting rod bearing
converts the rectilinear motion
of the piston into rotation
crankshaft
– inertia, keep the engine at
uniform speed when the crankshaft is not
receiving power from the piston
flywheel
confines the expanding
gases and forms the combustion chamber
cylinder block
– houses the valves and forms
a cover to the cylinder
Cylinder head
– end of the cylinder
between the head and the piston face where
combustion occurs; sometimes synonymous
with the term “cylinder”
Combustion chamber
– end of the cylinder
between the head and the piston face where
combustion occurs; sometimes synonymous
with the term “cylinder”
Combustion chamber
– serves the purpose of
supporting the shaft, mounting the cylinder,
housing the running parts, and forming the
reservoir for lubricating oil
Crankcase –
– serves to conduct the air
or air-fuel mixture into the cylinder
Intake manifold
– serves to conduct the
burned gases away from the engine
Exhaust manifold
– used for opening and closing ports
leading into or out of the combustion
chambers
Valves
– maybe formed in the cylinder
head or block or maybe a removable inserts
of special alloy steel
Valve seats
– fits tightly in the cylinder
block and serves to guide the valve in motion
Valve stem guide –
– raise the valves in
the L-head and T-head types of engines;
receives their motions from cams mounted
on a camshaft or cam gear
Valve lifter or tappets
serves to guide the
tappets in its motion
Valve lifter guide
pivoted in its center; one end
contacts the end of the valve stem and the
other contacts the upper end of the tappet
Rocker arm
linkage between the camshaft and
valves on overhead valve engines
Push rod -
– a wheel with a lobe or projection on its
face
cam
– rotating shaft used to push open
valves at the proper time in the engine cycle
camshaft
electrical device used to initiate
combustion in an SI engine by creating a
high-voltage discharge across an electrode
gap
Spark plug
Venturi flow device which
meters the proper amount of fuel into the air
flow by means of a pressure differential
Carburetor
mounted in exhaust
flow containing catalytic material that
promotes reduction of emissions by chemical
reaction
Catalytic converter -
– pressurized nozzle that sprays
fuel into the incoming air on SI engines or
into the cylinder on CI engines
Fuel injector
Electrically or mechanically
driven pump to supply fuel from the fuel tank
(reservoir) to the engine
fuel Pump
pump used to distribute oil from
the oil sump to required lubrication points
oil pump
butterfly valve mounted at the
upstream end of the intake system that
controls the amount of air flow into an SI
engine
Throttle
metal fins on the outside
surfaces of cylinders and head of an air-cooled
engine
Cooling fins
– system of liquid flow passages
surrounding the cylinders; usually constructed
as part of the engine block and head
Water Jacket
heat exchanger used to remove
heat from the engine coolant after the engine
has been cooled upstream end of the intake
system; honeycomb construction
Radiator
– pump used to circulate engine
coolant through the engine and radiator.
Water Pump
– to cool and
lubricate the surfaces and provide ignition
and fuel for the engine
Auxiliary parts & Accessories
